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Maths 1 Mark Question

Lines and Angles · Maharashtra Board STD 7 (MSBSHSE - Semi English Medium). 22 questions.

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1 Mark Question

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22 questions · timed · auto-graded

Question 11 Mark
Identify the complementary and supplementary pairs of angle from the following pair:
63°, 27°
Answer
63° + 27° = 90° so, this is a complementary pair of angle.
Here, (i) and (iii) are complementary pair of angles and (ii) and (iv) are supplementary pair of angles.
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Question 21 Mark
Identify the complementary and supplementary pairs of angle from the following pair:
25°, 65°
Answer
25° + 65° = 90° so, this is a complementary pair of angle.
Here, (i) and (iii) are complementary pair of angles and (ii) and (iv) are supplementary pair of angles.
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Question 31 Mark
In figure, name all the pairs of adjacent angles.
Answer
In fig., the adjacent angles are:
$\angle\text{BAD}\text{ and }\angle\text{DAC}$
$\angle\text{BDA}\text{ and }\angle\text{CDA}$
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Question 41 Mark
In figure, name all the pairs of adjacent angles.
Answer
In fig., the adjacent angles are:
$\angle\text{EBA}\text{ and }\angle\text{ABC}$
$\angle\text{ACB}\text{ and }\angle\text{BCF}$
$\angle\text{BAC}\text{ and }\angle\text{CAD}$
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Question 51 Mark
Find the supplement of the following angle:
135°
Answer
The two angle are said to be supplementary angle if the sum of those angle is 180°
180° - 135° = 45°
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Question 61 Mark
In Figure, A, B, C are collinear points and $\angle\text{DBA}=\angle\text{EBA}$
  1. Name two linear pairs.
  2. Name two pairs of supplementary angles.
Answer
  1. Linear pairs:
$\angle \text{ABD}\text{ and }\angle \text{DBC}$

$\angle \text{ABE}\text{ and }\angle \text{EBC}$
  1. Because every linear pair forms supplementary angles, these angles are:
$\angle \text{ABD}\text{ and }\angle \text{DBC}$

$\angle \text{ABE}\text{ and }\angle \text{EBC}$
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Question 71 Mark
Identify the complementary and supplementary pairs of angle from the following pair:
120°, 60°
Answer
120° + 60° = 180° so, this is a supplementary pair of angle.
Here, (i) and (iii) are complementary pair of angles and (ii) and (iv) are supplementary pair of angles.
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Question 91 Mark
Find the complement of the following angle:
35º
Answer
The two angles are said to be complementary angles if the sum of those angle is 90°
Complementary angle for the following angle are:
90° - 35° = 55°
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Question 101 Mark
Find the complement of the following angle:
45°
Answer
The two angles are said to be complementary angles if the sum of those angle is 90°
Complementary angle for the following angle are:
90° - 45° = 45°
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Question 111 Mark
Can two acute angles form a linear pair?
Answer
No, two acute angles cannot form a linear pair because their sum is always less than 180°.
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Question 121 Mark
Identify the complementary and supplementary pairs of angle from the following pair:
100°, 80°
Answer
100° + 80° = 180° so, this is a supplementary pair of angle.
Here, (i) and (iii) are complementary pair of angles and (ii) and (iv) are supplementary pair of angles.
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Question 131 Mark
Find the complement of the following angle:
72°
Answer
The two angles are said to be complementary angles if the sum of those angle is 90°
Complementary angle for the following angle are:
90° - 72° = 18°
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Question 141 Mark
One of the angles forming a linear pair is an obtuse angle. What kind of angle is the other?
Answer
One of the Angles of a linear pair is obtuse, then the other angle should be acute, only then their sum will be 180°.
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Question 151 Mark
One of the angles forming a linear pair is a right angle. What can you say about its other angle?
Answer
One of the Angle of a linear pair is the right angle (90°)
Therefore, the other angle is
⇒ 180° - 90° = 90°
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Question 161 Mark
One of the angles forming a linear pair is an acute angle. What kind of angle is the other?
Answer
One of the Angles of a linear pair is acute, then the other angle should be obtuse, only then their sum will be 180°.
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Question 171 Mark
Find the supplement of the following angle:
90°
Answer
The two angle are said to be supplementary angle if the sum of those angle is 180°
180° - 90° = 90°
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Question 181 Mark
Find the supplement of the following angle:
70°
Answer
The two angle are said to be supplementary angle if the sum of those angle is 180°
180° - 70° = 110°
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Question 191 Mark
How many pairs of adjacent angles are formed when two lines intersect in a point?
Answer
If the two lines intersect at a point, then four adjacent pairs are formed and those are linear as well.
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Question 201 Mark
Find the complement of the following angle:
85°
Answer
The two angles are said to be complementary angles if the sum of those angle is 90°
Complementary angle for the following angle are:
90° - 85° = 5°
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Question 211 Mark
Write down each pair of adjacent angles shown in Figure.
Answer
The angles that have common vertex and a common arm are known as adjacent angles.
The adjacent angles are:
$\angle \text{DOC}\text{ and }\angle \text{BOC}$
$\angle \text{COB}\text{ and }\angle \text{BOA}$
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Question 221 Mark
Find the supplement of the following angle:
120°
Answer
The two angle are said to be supplementary angle if the sum of those angle is 180°
180° - 120° = 60°
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